Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chung dinh » chung minh, phuong dinh, thuong dinh
mot chieu » doi chieu, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
dinh toan » tinh toan, hinh toan, minh toan
va duong » van duong, va tuong, va huong
toan cau » toan cao, toan ban, toan tap
va dung » van dung, vat dung, va ung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) xanh - hanh tang ((va dung) OR (va duong)) chung dinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) xanh - hanh tang ((va dung) OR (va duong)) chung dinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) xanh - hanh tang ((va dung) OR (va duong)) chung dinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) xanh - hanh tang ((va dung) OR (va duong)) chung dinh toan cau*.